British music publisher Chrysalis said its share (net publisher's share) of income from royalties rose 15% at constant currencies to £7.5 million ($10.8 million) in its fiscal first half, and the second half had started well.

Chrysalis was helped by consecutive U.S. no.1 hits co-written and produced by its writers: Taio Cruz's "Break My Heart," written by Fraser T Smith, and "Rude Boy by Rihanna," writen by Rob Swire.

Chief executive Jeremy Lascelles said on Wednesday (May 26) the company's search for music publishing catalogs had borne fruit, with the acquisition of First State Media Group.

"We have made a very encouraging start to the remainder of the financial year with successive No. 1 singles in the U.S., and are confident of building on this with a strong release schedule in the second half," he said in a statement.

Normalized operating profit for the six months ended March 31 rose by £1.2 million ($1.7 million) to £2.6 million ($3.7 million), mainly due to increased royalties from a remastered Beatles album. Chrysalis holds certain George Martin producer master rights.

Revenue was £32.7 million ($47.1 million), up from £31.2 million ($45 million).

Chrysalis owns songs by David Bowie, Blondie and Gnarls Barkley, among others.